I'm currently revisiting some Sigur Rós. This band is pure genius in terms of emotional calming and wonderment.
If you want to see some of their more popular music, check out:
http://www.youtube.com/watch?v=zQ5Grncdjlc (Svefn-g-Englar) and
http://www.youtube.com/watch?v=Zr_MJAOyOeU (Glósóli).
They are so much more than these two pieces.
Cheers,
Simon